Synthesis and properties of a solid solution formed in the CrVMoO7 - AlVMoO7 system

It has been shown by the methods of X-ray powder diffraction (XRD), differential thermal analysis (DTA) and infrared spectroscopy (IR) that solid solutions of a formula Cr_1−xAl_xVMoO₇, where xε (0−0.65), are formed in the system CrVMoO₇-AlVMoO₇. The obtained research results have proven that the ions Al3+ are incorporated into the crystal lattice of CrVMoO₇ instead of Cr³⁺, which causes a contraction of the lattice and a shift of IR absorption bands towards higher values of wavenumbers. The phases Cr_1−xAl_xVMoO₇ melt incongruently in the temperature range from 710°C (for x=0.65) to ∼820°C in the case of x close to zero This revised version was published online in July 2006 with corrections to the Cover Date.